Deadbolt thumbturn



FIG. 1 is a top plan view of a deadbolt thumbturn showing my new design;

FIG. 2 is a front elevational view thereof, the rear being a mirror image of that shown;

FIG. 3 is an end elevational view of the long end thereof;

FIG. 4 is an end elevational view of the short end thereof; and,

FIG. 5 is a bottom plan view thereof.

The broken-line disclosure in the views is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a deadbolt thumbturn, as shown and described. 